[PATCH 5/7] t0013: test DC_AND_OPENSSL_SHA1, too

[Johannes Schindelin <johannes.schindelin@gmx.de>]

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 Makefile             |  1 +
 t/helper/test-sha1.c | 10 ++++++++++
 t/t0013-sha1dc.sh    | 10 ++++++++++
 3 files changed, 21 insertions(+)

diff --git a/Makefile b/Makefile
index 3e181d2f0e2..0b581357625 100644
--- a/Makefile
+++ b/Makefile
@@ -2251,6 +2251,7 @@ GIT-BUILD-OPTIONS: FORCE
 	@echo NO_UNIX_SOCKETS=\''$(subst ','\'',$(subst ','\'',$(NO_UNIX_SOCKETS)))'\' >>$@+
 	@echo PAGER_ENV=\''$(subst ','\'',$(subst ','\'',$(PAGER_ENV)))'\' >>$@+
 	@echo DC_SHA1=\''$(subst ','\'',$(subst ','\'',$(DC_SHA1)))'\' >>$@+
+	@echo DC_AND_OPENSSL_SHA1=\''$(subst ','\'',$(subst ','\'',$(DC_AND_OPENSSL_SHA1)))'\' >>$@+
 ifdef TEST_OUTPUT_DIRECTORY
 	@echo TEST_OUTPUT_DIRECTORY=\''$(subst ','\'',$(subst ','\'',$(TEST_OUTPUT_DIRECTORY)))'\' >>$@+
 endif
diff --git a/t/helper/test-sha1.c b/t/helper/test-sha1.c
index a1c13f54eca..27ce8869e51 100644
--- a/t/helper/test-sha1.c
+++ b/t/helper/test-sha1.c
@@ -8,6 +8,16 @@ int cmd_main(int ac, const char **av)
 	int binary = 0;
 	char *buffer;
 
+	if (ac > 1 && !strcmp(av[1], "--disable-sha1dc")) {
+#ifdef SHA1_DC_AND_OPENSSL
+		toggle_sha1dc(0);
+#else
+		die("Not compiled with DC_AND_OPENSSL_SHA1");
+#endif
+		ac--;
+		av++;
+	}
+
 	if (ac == 2) {
 		if (!strcmp(av[1], "-b"))
 			binary = 1;
diff --git a/t/t0013-sha1dc.sh b/t/t0013-sha1dc.sh
index 435a96d6108..2b529b31b4e 100755
--- a/t/t0013-sha1dc.sh
+++ b/t/t0013-sha1dc.sh
@@ -5,6 +5,10 @@ test_description='test sha1 collision detection'
 TEST_DATA="$TEST_DIRECTORY/t0013"
 
 test -z "$DC_SHA1" || test_set_prereq DC_SHA1
+test -z "$DC_AND_OPENSSL_SHA1" || {
+	test_set_prereq DC_AND_OPENSSL_SHA1
+	test_set_prereq DC_SHA1
+}
 
 test_expect_success DC_SHA1 'test-sha1 detects shattered pdf' '
 	test_must_fail test-sha1 <"$TEST_DATA/shattered-1.pdf" 2>err &&
@@ -12,4 +16,10 @@ test_expect_success DC_SHA1 'test-sha1 detects shattered pdf' '
 	grep 38762cf7f55934b34d179ae6a4c80cadccbb7f0a err
 '
 
+test_expect_success DC_AND_OPENSSL_SHA1 'sha1dc can be turned off' '
+	test-sha1 --disable-sha1dc <"$TEST_DATA/shattered-1.pdf" 2>err &&
+	! test_i18ngrep collision err &&
+	! grep 38762cf7f55934b34d179ae6a4c80cadccbb7f0a err
+'
+
 test_done
-- 
2.12.1.windows.1